71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
#include "ergotaco.h"
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bool i2c_initialized = 0;
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i2c_status_t mcp23018_status = 0x20;
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void matrix_init_kb(void) {
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// (tied to Vcc for hardware convenience)
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//gpio_set_pin_input(B4); // set B(4) as input, internal pull-up disabled
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// unused pins
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// set as input with internal pull-up enabled
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gpio_set_pin_input_high(B4);
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gpio_set_pin_input_high(B5);
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gpio_set_pin_input_high(B6);
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gpio_set_pin_input_high(B7);
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gpio_set_pin_input_high(C6);
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gpio_set_pin_input_high(C7);
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gpio_set_pin_input_high(D4);
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gpio_set_pin_input_high(D5);
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gpio_set_pin_input_high(D6);
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gpio_set_pin_input_high(D7);
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gpio_set_pin_input_high(E6);
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gpio_set_pin_input_high(D0);
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gpio_set_pin_input_high(D1);
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gpio_set_pin_input_high(D4);
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gpio_set_pin_input_high(D6);
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gpio_set_pin_input_high(D7);
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matrix_init_user();
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}
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uint8_t init_mcp23018(void) {
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print("starting init");
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mcp23018_status = 0x20;
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// I2C subsystem
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// uint8_t sreg_prev;
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// sreg_prev=SREG;
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// cli();
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if (i2c_initialized == 0) {
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i2c_init(); // on pins D(1,0)
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i2c_initialized = true;
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_delay_ms(1000);
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}
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// set pin direction
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// - unused : input : 1
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// - input : input : 1
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// - driving : output : 0
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uint8_t data[] = {0b00000000, 0b00111111};
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mcp23018_status = i2c_write_register(I2C_ADDR, IODIRA, data, sizeof(data), ERGODOX_EZ_I2C_TIMEOUT);
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if (!mcp23018_status) {
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// set pull-up
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// - unused : on : 1
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// - input : on : 1
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// - driving : off : 0
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mcp23018_status = i2c_write_register(I2C_ADDR, GPPUA, data, sizeof(data), ERGODOX_EZ_I2C_TIMEOUT);
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}
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// SREG=sreg_prev;
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//uprintf("Init %x\n", mcp23018_status);
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return mcp23018_status;
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}
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